Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,684,457	$ 2,652,066
Commercial, Industrial, And Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,174,398	1,169,379
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	142,065	140,548
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,032,333	1,028,831
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,105,084	1,099,397
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	130,910	128,812
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	974,174	970,585
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	24,669	15,864
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,011	761
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	21,658	15,103
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	44,601	53,266
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	8,100	10,575
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	36,501	42,691
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	44	852
Doubtful [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	44	400
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 0	$ 452